Originally Posted by cbyrd2200
when my equipment malfunctions, I don't poke it with a chopstick.
That's by far the fastest way to find cold solder joints or broken leads.
DO NOT use a pencil like some Darwin Award nominees have done, the graphite is conductive
What does the scope trace tell You?
How are the rail voltages?
How about the DC offset in output?
Troubleshooting amps without schematics, especially SMD SS amps, is a MAJOR PITA, and no-one who values their time is willing to touch 'em without schematics.
Unless of course one has something irreplaceable in front of them.
The time to spend however is Yours to spend, so nothing obviously prevents you from trying.
The best of luck for You in your quest.